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Finding the Fourth Proportional to 389,449.20, 584,173.80 and 239,858.40

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Solution

The fourth proportional to 389,449.20, 584,173.80 and 239,858.40 is: 359,787.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,449.20 : 584,173.80 = 239,858.40 : x
  2. Step 2: Convert to fraction form
    389,449.20/584,173.80 = 239,858.40/x
  3. Step 3: Cross multiply
    389,449.20x = 584,173.80 × 239,858.40
  4. Step 4: Simplify right side
    389,449.20x = 140,118,992,989.92
  5. Step 5: Solve for x
    x = 140,118,992,989.92/389,449.20
  6. Step 6: Final answer
    x = 359,787.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.